Redundant error log thrown when an optional subaccount secret does not exist

[szwedm]

The following error is visible in the controller logs even when only the default secret should be used for service instances management:

sap-btp-service-operator/internal/utils/secret_resolver.go

Line 67 in 765f5e5

sr.Log.Error(err, fmt.Sprintf("Could not fetch secret %s from management namespace %s", name, sr.ManagementNamespace))

.
The error is ignored later:

sap-btp-service-operator/internal/utils/secret_resolver.go

Line 97 in 765f5e5

if client.IgnoreNotFound(err) != nil {

and the controller picks the default secret for further operations.

[I065450]

I will change the log level to info.

[I065450]

#470